//這兩種配置等價(jià)
@Cacheable(value = "user") //@Cacheable(cacheNames = "user")
User getUser(Integer id);

@Cacheable(value = "user",key = "#root.method.name")
User getUser(Integer id);

import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.lang.reflect.Method;
import java.util.Arrays;
@Configuration
public class MyCacheConfig {
    @Bean("myKeyGenerator")
    public KeyGenerator keyGenerator(){
        return new KeyGenerator(){
            @Override
            public Object generate(Object target, Method method, Object... params) {
                return method.getName()+ Arrays.asList(params).toString();
            }
        };
    }
    /**
     * 支持 lambda 表達(dá)式編寫
     */
    /*@Bean("myKeyGenerator")
    public KeyGenerator keyGenerator(){
        return ( target,  method, params)-> method.getName()+ Arrays.asList(params).toString();
    }*/
}

@Cacheable(value = "user",condition = "#id>0")//傳入的 id 參數(shù)值>0才進(jìn)行緩存
User getUser(Integer id);

@Cacheable(value = "user",condition = "#a0>1")//傳入的第一個(gè)參數(shù)的值>1的時(shí)候才進(jìn)行緩存
User getUser(Integer id);

@Cacheable(value = "user",condition = "#a0>1 and #root.methodName eq 'getUser'")//傳入的第一個(gè)參數(shù)的值>1 且 方法名為 getUser 的時(shí)候才進(jìn)行緩存
User getUser(Integer id);

@Cacheable(value = "user",unless = "#result == null")//當(dāng)方法返回值為 null 時(shí)，就不緩存
User getUser(Integer id);

@Cacheable(value = "user",unless = "#a0 == 1")//如果第一個(gè)參數(shù)的值是1,結(jié)果不緩存
User getUser(Integer id);